System and method for provision of a second line service to a telecommunications device using dialed sequence

ABSTRACT

A method and system for providing a second line service (“SLS”) feature to a subscriber using a telecommunications device (“TD”) which includes receiving at a switch on the network of the subscriber&#39;s primary service provider a communication made up of a trigger and a directory number. When the communication is received at the primary service provider&#39;s switch, the switch parses the communication and detects the trigger. Once the switch has received the communication, the switch additionally transmits a query message to a SLS platform that manages the SLS feature. As a result of the switch&#39;s query message transmission, the switch receives a reply to the query message from the SLS platform. Based at least in part on the reply to the query message, the switch can route the communication such that the switch connects one or multiple voice channel circuit between the subscriber&#39;s TD and the terminating TD.

CROSS-REFERENCE

This application is a continuation of the United States application forpatent that was filed on Jun. 17, 2014 and assigned Ser. No. 14/307,407,which application is a continuation-in-part of the United StatesApplication for Patent filed on Jun. 5, 2008, bearing the title ofDIRECT DIAL TO VOICE MAIL and assigned Ser. No. 12/133,996, which is nowabandoned, and which application claims priority from the United Statesprovisional application for patent under 35 U.S.C. §119(e) which wasfiled on Jun. 17, 2013 and assigned Ser. No. 61/836,145. Each of theabove-referenced applications, as well as any documents they incorporateby reference, are hereby incorporated by reference in their entirety.

BACKGROUND

In simpler times, communication meant a face-to-face conversation, ahand written note or, perhaps, a phone call between two landlines. Timeshave changed. People today communicate constantly and simultaneously viamyriad channels, most of which are mobile. Of all the means ofcommunication available to today's users, the cellular telephone may bethe most ubiquitous. It seems that everybody has one and that everybodyuses their mobile device to stay connected, keep their busy lives movingforward, and fulfill their endless responsibilities.

For many people, those endless responsibilities are of a personal andprofessional mix. Fielding phone calls and texts from family and friendson the same mobile device from which you endeavor to conduct business isa recipe for confusion. To keep the personal and business channels ofcommunication separated, many people simply carry two separate mobiledevices, each with its own dedicated phone number and service options.If mobile device “A” rings, the user knows it's of a personal nature. Ifmobile device “B” rings, the user knows that it's a business relatedcall. Although carrying two mobile devices with you is one solution forkeeping personal and business demands separate, keeping track of twomobile devices and their related service plans, however, can befrustrating and expensive.

For many users, porting a second phone number to a single device makesmore sense—in doing so, at least the number of devices that must be keptup with in order to keep personal and business matters segregated havebeen reduced. But current systems and methods for managing multiplenumbers on a single device are not without issues. For example, adding asecond line to a service plan often dictates that the user have a moreexpensive “family plan” established with the service provider and oftenthere still is no good way to know which number a calling party hasdialed. Using a dual-SIM (“subscriber identity module”) phone is anothersolution, with each SIM card being dedicated to a separate line, but thecost of redundant service plans to accommodate the multiple SIM cards,not to mention the cost of the dual-SIM phone itself, can be exorbitant.

Accordingly, what is needed is a system and method for providing aplurality of dedicated phone numbers to a single telecommunicationsdevice in such a manner that the user of the device can separate andmanage communications on each.

SUMMARY OF THE DISCLOSURE

A method and system are described for providing a plurality of dedicatedphone numbers to a single telecommunications device. Through this methodand system, the user of the single communication device can separate andmanage communications directed to multiple phone numbers without theneed of having multiple telecommunications devices or, having multipleSIM cards with each such card being dedicated to the individual phonenumbers. The plurality of phone numbers are provisioned or associatedwith a single telecommunications device by providing a second lineservice feature. It should be appreciated that although the variousembodiments, including various features and aspects, is referred to as a“second line service”, the various embodiments may include more thanjust a second line and in fact, any number of additional lines may beenabled or associated for a single telecommunications device. Bysubscribing to this second line service feature, the user overcomes theproblems and needs described above as well as other shortcomings in theart.

An exemplary method, according to one embodiment, can be implemented inan environment in which a subscriber to the second line service operateswithin the network of the subscriber's service provider. A networkswitch receives a communication originating from the subscriber'stelecommunication device when the subscriber initiates a request toestablish a call. The communication may include, among other things, atrigger and a directory number to identify the destination or intendedrecipient of the call. When the network communication is received at theprimary service provider's switch, the switch parses the networkcommunication and detects the trigger. Notably, the switch's parsing ofthe communication can involve the switch recognizing that the trigger isone of a variety of trigger configurations including, but not limitedto, (a) at least a one digit prefix, (b) at least a one digit suffix,(c) simply, at least one additional digit, or (d) a combination of anytwo or more of these, all in addition to the directory number. It shouldbe appreciated that in this, as well as other embodiments, the trigger,rather than being a separate digit, may actually be derived from thedialed number itself.

Once the switch has received the network communication and recognizedthe trigger, the switch then transmits a query message to a second lineservice platform that manages the second line service feature. Thesecond line service platform may be identified or selected based on thetrigger, the telephone number associated with the originatingtelecommunications device, the dialed number, or a combination of two ormore of these and other elements. This query message is based at leastin part on how the switch is configured to handle the detection andprocessing of the trigger. As a result of the switch's query messagetransmission, the switch receives a reply to the query message from thesecond line service platform. The reply to the query message can includeinformation indicating how to interpret the communication's embeddeddirectory number and information for routing the communication to thecorrect terminating destination. Based at least in part on the reply tothe query message, the switch can route the network communication suchthat the switch connects one or multiple voice channel circuits betweenthe subscriber's telecommunications device and one or more terminatingtelecommunications devices. The second line service platform, uponreceiving the query may determine that the call origination is intendedto be associated with one of the subscriber's second numbers. Thedetermination can be based on the trigger, the dialed number or acombination of this information as well as other information. As such,the reply to the query message from the second line service platform canadditionally include the intended second line service number of thesubscriber's telecommunications device. The switch can then operate topopulate the caller ID field of the call being established with thereceived second line number. Thus, the receiving party will receive notonly the call, but also the identification of the second line numberassociated with the origination of the call once the networkcommunication is properly routed.

In another embodiment, the switch at the primary service provider mayreceive a communication that at least includes a trigger and a directorynumber. Further, the network communication can originate from thesubscriber's mobile telecommunications device and can be transmitted tothe switch through a mobile telephone switching office. When the networkcommunication is received at the primary service provider's switch, theswitch recognizes the directory number (i.e., a 10 digit telephonenumber embedded within the communication), and recognizes that thetrigger, also embedded within the communication, is a request to routethe network communication using the second line service feature.Notably, the switch's recognition of the trigger can involve the switchrecognizing at least a one digit prefix, suffix, embedded number or acombination thereof in addition to the directory number.

Once the switch has received the network communication and recognizedthe trigger, the switch then transmits a query message to the secondline service platform managing the second line service feature. Thisquery message is based at least in part on how the switch is configuredto handle the detection and processing of the trigger. Notably,transmission of the query message from the switch can involve the switchexecuting a programmed command to send a message to the second lineservice platform. The transmission of the query message from the switchcan additionally involve holding the network communication until thesecond line service platform responds to the query message. Holding thenetwork communication includes, among other things, delaying orpreventing the actions necessary to complete the call through thenetwork to the intended recipient or terminating device. In someembodiments, once the switch detects the trigger and knows that the SLSplatform involvement is necessary (or information is required of the SLSplatform) then the call processing can be paused until such informationis received from the SLS platform. In other embodiments, the callprocessing can continue and then when updated information is receivedfrom the SLS platform, this information may be used to augment or modifythe information provided to the terminating device.

As a result of the switch's query message transmission, the switchreceives a reply to the query message from the second line serviceplatform. The reply from the second line service platform may includeinformation identifying how to interpret the directory number embeddedin the communication and information for routing the communication tothe correct terminating destination. Based at least in part on the replyto the query message, the switch can route the network communicationsuch that the switch connects one or multiple voice channel circuitsbetween the subscriber's telecommunications device and one or moreterminating telecommunications devices. In formulating the reply to thequery message, the second line service platform may identify the secondline number to be associated with the call and then, to include oridentify the second line service number in the reply. Once received theswitch can populate caller ID of the call with the second line servicenumber. Thus, the receiving device will recognize the call as comingfrom the second line once the network communication is properly routed.

Another embodiment of the second line service operates within a roamingenvironment. In this embodiment, a network communication, originatingfrom a subscriber's mobile telecommunication device, is received at theswitch of the primary service provider. The network communication mayinclude, among other things, a trigger and a directory number. In thisparticular embodiment, the telecommunication device originating the callis roaming on a different telecommunications network. When the networkcommunication is received at the primary service provider's switch, theswitch recognizes the directory number, which is a 10 digit telephonenumber embedded within the communication, and recognizes that thetrigger, also embedded within the communication, is a request to routethe network communication using the second line service feature.Notably, the switch's recognition of the trigger can involve the switchrecognizing at least a one digit prefix, suffix, embedded entry or acombination thereof in addition to the directory number.

Once the switch has received the network communication, the switch thentransmits a query message to the second line service platform that ispart of the subscriber's primary service provider's network and thatmanages the second line service feature. This query message is based atleast in part on how the switch is configured to handle the detectionand processing of the trigger. The transmission of the query messagefrom the switch can involve the switch executing a programmed command tosend a message the second line service platform. The transmission of thequery message from the switch can additionally involve the switchholding the network communication until the second line service platformresponds to the query message.

As a result of the switch's query message transmission, the switchreceives a reply to the query message from the second line serviceplatform. The reply can include information identifying how to interpretthe communication's imbedded directory number and information forrouting the communication to the correct terminating destination. Basedat least in part on the reply to the query message, the switch cancommunicate routing instructions to the roamed-on telecommunicationsnetwork. In formulating the reply, the second line service platform mayidentify a second line to be associated with the originating call andthen include information identifying the second line number in thereply. The switch can then communicate the second line service number tothe roamed-on telecommunications network for purposes of populating itinto the caller ID field of the communication setup request being sentto the terminating telecommunications device.

BRIEF DESCRIPTION OF THE DRAWINGS

In the Figures, like reference numerals refer to like parts throughoutthe various views unless otherwise indicated. For reference numeralswith letter character designations such as “102A” or “102B”, the lettercharacter designations may differentiate two like parts or elementspresent in the same figure. Letter character designations for referencenumerals may be omitted when it is intended that a reference numeralencompass all parts having the same reference numeral in all figures.

FIG. 1 is a block diagram illustrating an exemplary environment suitablefor various embodiments of a system and method for providing a secondline service to a subscriber using a TD.

FIG. 2 is a high level diagram illustrating an exemplary environment fora global telecommunications network wherein a subscriber to a secondline service can roam on a foreign telecommunications network.

FIG. 3 is a flow diagram illustrating actions included in an exemplaryembodiment of the second line service.

FIG. 4 is a flow chart illustrating actions included in an exemplaryembodiment of the SLS, focusing on the operation of an embodiment fromthe calling party's and the called party's perspective.

DETAILED DESCRIPTION

The word “exemplary” is used herein to mean “serving as an example,instance, or illustration.” Any aspect described herein as “exemplary”is not necessarily to be construed as preferred or advantageous overother aspects.

One or more components may reside within a process and/or thread ofexecution, and a component may be localized on one computer and/ordistributed between two or more computers. In addition, these componentsmay execute from various computer readable media having various datastructures stored thereon. The components may communicate by way oflocal and/or remote processes such as in accordance with a signal havingone or more data packets (e.g., data from one component interacting withanother component in a local system, distributed system, and/or across anetwork such as the Internet with other systems by way of the signal).

In this description, the terms “telecommunications device,”“communication device,” “wireless device,” “wireless telephone,”“wireless communication device” and “wireless handset” are usedinterchangeably. With the advent of third generation (“3G”) and fourthgeneration (“4G”) wireless technology, greater bandwidth availabilityhas enabled more portable computing devices with a greater variety ofwireless capabilities. Therefore, a telecommunications device (“TD”) mayinclude a cellular telephone, a pager, a PDA, a smartphone, a navigationdevice, a tablet personal computer (“PC”), a hand-held computer with awireless connection or link, etc.

In this description, the terms “call” and “communication,” in their nounforms, envision any data transmission routed across a network from onedevice to another including, but not limited to, a voice transmission, atext message, a video message, a page, a data transmission, etc.

The present disclosure presents various embodiments, as well as featuresand aspects that may be included in such embodiments, of a second lineservice (“SLS”) deployment for providing enhanced capabilities to a userof a telecommunications device (“TD”). More specifically, variousembodiments of the SLS may include the dialing of a special prefix thatis used to signal the telecommunications network that the presentlydialed call is to be subject to special routing. For instance, in oneembodiment, a calling party can call a predefined prefix, and then diala called party's 10 digit telephone number. When the switching system,central office or other component of the telecommunications networkreceives the dialed sequence, the component parses or examines thereceived sequence of dialed numbers to compare at least portions of thesequence to known patterns, such as the predefined prefix. If thecomponent identifies the predefined prefix within the dialed sequence,the component processes the received sequence as one for which thecalling party wishes to utilize its second line service to contact thecalled party. In another embodiment, rather than a prefix, a suffix maybe used to signal to the telecommunications network that the call is tobe routed using the calling party's second line service.

Turning now to the figures in which like elements are represented bysimilar labels, various embodiments, as well as aspects, features andcharacteristics of the embodiments are presented in more detail.

FIG. 1 is a block diagram illustrating an exemplary environment suitablefor various embodiments of a system and method for providing an SLS to asubscriber using a TD. The environment 100 is illustrated as operatingin conjunction with or integral to a global telecommunications networkand as such, a portion of a global telecommunications network includingan Advanced Intelligent Network (“AIN”) of a typical local exchangecarrier (“LEC”) is illustrated. The AIN is well known to those skilledin the art and includes a plurality of central office switches with someof the central office switches equipped with service switching points(“SSPs”). An SSP (e.g., a 5ESS, DMS, or 1AESS type central officeswitch) is the AIN component of a typical electronic central officeswitch used by a local exchange carrier. The terms “SSP” and “switch”are used interchangeably to refer to a telecommunications switch forconnecting voice channel circuits.

Each SSP in the AIN serves as an originating switch for a number ofsubscriber lines. Generally, an originating switch is associated withand communicatively coupled with the subscriber's lines serviced by theswitch. Thus, the originating switch that services a subscriber's linecan be the first network element of the AIN to process communicationsoriginating on the subscriber's line.

The originating switch receives a communication originating on thesubscriber line and implements further processing, such as verifyingthat the subscriber is authorized to use the network,supplementing/supplanting data within the communication, and routing thecommunication for connection with a terminating destination, such astelecommunications devices TD₂ 112, TD₃ 114, and TD_(N) 116. Forexample, an SSP 122 that receives a communication from an originatingstation, such as telephone device TD₁ 110, can route the communicationfor connection with a terminating destination TD_(N) 116 in accordancewith the packet-switched protocol of the PSTN. The details of suchcommunication routing are familiar to those of ordinary skill in therelevant art and as such, will not be presented in further detail.

In addition to routing, the SSP 122 may populate the calling lineidentification (“CLID”) field, such as the CLID field in a call setuprequest being sent through the network to a terminating device, with thedirectory number associated with calling party's TD₁ 110, such that whenthe communication is received at the called party's TD_(N) 116, the CLIDmay be displayed for the benefit of the called party. Notably, althoughvarious embodiments described in the present disclosure use the CLID asan example of data that may be displayed for the benefit of the calledparty, it will be understood that any data associated with the SLSsubscriber/calling party, called party, or the like may be rendered forthe benefit of the user of such embodiments within the environment 100and, as such, only describing that the CLID is displayed will not limitthe scope of what is envisioned by the disclosure.

In FIG. 1, the environment 100 is illustrated as including an AIN withswitches that are interconnected by a network of voice channel linesknown as trunks. Trunks are the voice channel circuits that interconnectthe central office switches to connect voice-channel communications. Theterm “communication” includes all messages or communications that may beexchanged between two pieces of terminating equipment. Although theterminating equipment is illustrated as telephones, those skilled in theart will understand that terminating equipment may include other TDs,such as wireless telephones, TD₂ 112 and TD₃ 114 accessed through amobile telephone switching office (“MTSO”) 124, facsimile machines,computers, modems, etc.

As is understood by one of ordinary skill in the art, each piece ofterminating equipment in a telecommunications network is preferablyassigned a directory number. The term “directory number” is used hereinin a manner consistent with its generally understood meaning of a numberthat is dialed or input by a calling party at an originating station toreach a terminating destination. A directory number, typically a sevenor ten-digit number in the United States, is commonly referred to as a“telephone number.” For example, TD₁ 110 is associated with a primarytelephone number assigned to it by a primary service provider. As such,a subscriber to an SLS offered through an exemplary embodiment operatingwithin environment 100 may initiate communications from TD₁ 110 that areassociated with and/or directed to either the primary telephone numberprovided by the primary service provider or the secondary telephonenumber (“SLS telephone number”) provided, serviced and or facilitated bythe second line service provider.

Notably, depending on the particular embodiment, the primary serviceprovider and the second line service provider may be the same entity ordifferent entities. In embodiments where the primary service providerand the second line service provider are different entities, thesubscriber may receive separate billing records from each entity.However, it is envisioned that within certain embodiments where theprimary service provider and the second line service provider are notone and the same, that the providing entities may take advantage ofsession initiated protocols (“SIP”) to simplify billing records for theuser. Additionally, depending on the particular embodiment, thesubscriber to an SLS offered through an exemplary system operating inexemplary environment 100 may also receive communications from a thirdparty's TD that are directed to either the subscriber's primarytelephone number or the SLS telephone number.

In general, any communication directed from either the primary telephonenumber or the SLS telephone number of a subscriber's TD₁ 110, anoriginating station, is routed to a third party TD like TD₂ 112, TD₃ 114or TD_(N) 116, a terminating destination, by way of a telecommunicationssystem, such as the illustrated components operating within theexemplary environment 100. Notably, the exemplary environment 100envisions any and all networks for transmitting and terminatingcommunications between TDs such as, but not limited to, cellularnetworks, PSTNs, cable networks and the Internet. Notably, while the useof any particular protocol or communications standard may be a novelaspect of a particular embodiment disclosed herein, it will beunderstood that the scope of the embodiments is not limited to the useof any particular protocol or combination of protocols.

Methods for effecting the transmission of data through environment 100including communication setups, terminations, etc. are understood bythose of ordinary skill in the relevant art, and they may include theuse of protocols and standards such as, but not limited to, signalingsystem seven (“SS7”) protocol suite, SIP, customized applications formobile networks enhanced logic (“CAMEL”) or CAMEL Application Part(“CAP”), remote operations service element (“ROSE”), Voice Over IP(“VOIP”), etc. As one of ordinary skill in the relevant art wouldrecognize, CAMEL Application Part (CAP) is a user protocol that rides ontop of the Transaction Capabilities Application Part (“TCAP”) of the SS7protocol suite. Embodiments of the second line services may usecombinations of SIP, CAP, ISUP and/or other protocols to connect callsbetween calling and called parties on a mobile device network.

Routing a communication from the originating station to the terminatingdestination involves the selection of a routing path for thecommunication and may also involve the implementation of one or moreadvanced network functions. The ability of a typical SSP to providethese advanced network functions, however, is limited due to physicaland other constraints. The AIN therefore provides for increasedinformation processing capability through a system of intelligentnetwork elements that are functionally connected with the SSPs through anetwork of data links.

These intelligent network elements of the AIN can communicate with eachother, and with the SSPs of the network, via digital data messagestransmitted over the network of digital data links. An SSP may beconfigured to interface with these intelligent network elements throughthe use of a “trigger.” In general, a trigger serves as an indicator forthe SSP to take certain action. The SSP is configured so that, when theSSP detects a predetermined set of conditions defining the trigger inassociation with a communication, the SSP creates an appropriate digitaldata message for transmission over the network of digital data links.The SSP may also suspend routing of the communication (i.e., hold thecommunication) until the SSP receives a reply to its message from anappropriate network element instructing the SSP to take a certainaction. If the SSP receives no instructions within a certain amount oftime, the SSP may “time-out” and execute a default task for thecommunication.

The message created by an SSP in response to a trigger is known as a“query” message. A query message opens a “transaction” and the SSPgenerally holds the communication while the transaction remains open.The reply to the query message may be a “conversation” message or a“response” message. Conversation messages allow for bi-directionalexchanges between network elements while the transaction remains open. A“response” message closes the transaction opened by the query message,and usually instructs the SSP to route the held communication forconnection with a terminating destination. A trigger is typicallyactivated or deactivated at an SSP by another network element through an“update” message. Query messages, conversation messages, responsemessages, and update messages are standard types of messages defined bythe AIN protocol. The details of the AIN protocol are well known tothose of ordinary skill in the relevant art.

In an exemplary embodiment, the originating switch 122 can be an SSPswitch. It is noted, however, that the AIN may also include non-SSPcentral office switches (not shown). It will be appreciated that anon-SSP switch may initially receive a communication from a subscriberline, such as when the subscriber is roaming on a foreigntelecommunications network, and pass the communication to anotherswitch, such as SSP 122, for further processing. Similarly, in acellular or wireless network, an MTSO or other receiver/transmitter mayinitially receive a communication from a cellular telephone or wirelessunit and route the communication to another network element, such as SSP122, for further processing. In this manner, advanced network functionsavailable through the AIN may be provided to wireless units and tosubscriber lines that are directly connected to non-SSP switches,roaming on foreign networks, employing wireless devices, or anycombination thereof.

Each switch in the AIN is connected to a signal transfer point 126 via adata link. The signal transfer point 126 is a multi-port, high-speedpacket switch that is programmed to respond to the routing informationin the SS7 protocol and route the packet to its destination. Digitaldata messages flowing between the service control point 128 and the SSP122 go through signal transfer point 126. Thus, the signal transferpoint 126 is not normally a terminating destination; instead, it merelydirects traffic among the other entities on the network that generateand respond to the data messages.

Much of the intelligence of the AIN resides in a one or more servicecontrol points 128 that are connected to the signal transfer point 126by a SS7 data link. A service control point 128 is a remotelyprogrammable intelligent network element. As is known to those ofordinary skill in the relevant art, a service control point isphysically implemented by relatively powerful fault tolerant computers.Among the functions performed by a service control point is themaintenance of network databases, such as database 130, which is used inproviding subscribers with advanced network functions.

Additional devices for implementing advanced network functions withinthe AIN are provided by a service management system 132. The servicemanagement system 132 is connected via a data link to the servicecontrol point 128. The service management system 132 provides acentralized platform for remotely programming the service control point128 so that a coordinated information-processing scheme may beimplemented for the AIN. The service management system 132 isimplemented by a large general-purpose computer and interfaces tobusiness offices of the local exchange carrier and inter-exchangecarriers. The functions of the service management system 132 include:(a) downloading information to the database 130 when new subscribers areadded or when subscribers modify their ensemble of services; (b)performing data reloads when the service control point 128 crashes orwhen software needs to be updated; (c) implementing high volume routingservices, such as call forwarding and 800 number translation androuting; (d) maintaining and providing access to high volume databasesfor the authorization of billing, such as credit card numbervalidations; and (e) downloading, on a non-real-time basis, billinginformation that is needed in order to appropriately invoice telephonecompany subscribers for the services provided.

As illustrated in FIG. 1, the AIN also includes a service node 134,which may also be referred to as a service circuit node. The servicenode 134 includes voice and dual tone multi-frequency (“DTMF”) signalrecognition devices and voice synthesis devices. The service node 134communicates with the service control point 128 via a data link usingX.25 or TCP/IP protocols, and to the service management system 132 viaanother data link. In addition, the service node 134 typically isconnected to one or more (but usually only a few) SSPs via IntegratedService Digital Network (“ISDN”) links, as shown by the connection 136to the service switching point 122.

The AIN thus provides subscribers with a selectable menu of advancednetwork functions. These advanced network functions are typically soldon a per-service basis, or in groups of services known as calling plans.Each subscriber may select a set of advanced network functions, or acalling plan that suits the subscriber's needs. Moreover, eachsubscriber may generally select among a plurality of local advancednetwork functions, as well as select among a plurality of longdistance/roaming advanced network functions.

Cellular, wireless digital or mobile communication networks aresimilarly situated to provide intelligent features similar to what areavailable through the AIN or, in conjunction with components of the AIN.In addition, a PBX 150 connected to the telecommunications network suchas through a service switching point 122 or even an MTSO or other pointof entry may also operate to provide some or all aspects of anembodiment of the SLS while servicing stations S1 152 and SN 154.

Thus, referring back to FIG. 1, which depicts an environment 100suitable for providing or housing an embodiment of an SLS to service TD₁110, those familiar with telecommunications networks will appreciatethat an SLS can be provided, at least on some embodiments, as anadvanced network function accomplished by the novel and nonobviousmethod enabled and described by this disclosure. When an SLS subscriberwishes to initiate a communication from their TD₁ 110 to a third partyTD_(N) 116 using their SLS number instead of their primary telephonenumber, the subscriber dials a predefined prefix in addition to thedirectory number of TD_(N) 116. In another embodiment, rather than aprefix, a predefined suffix or simply a predefined sequence that may beincorporated into the beginning, end or embedded within a directorynumber or transmitted via a different channel may be used instead.Regardless, this dialed sequence, being part of the data that makes upthe communication in some embodiments, includes the prefix, suffix orpredefined sequence and it operates as a trigger for the SSP 122.

When the SSP 122 intercepts the communication, it is configured tosearch for the trigger in the received communication. Because thecommunication from TD₁ 110 includes the predefined trigger for the SSL,the SSP 122 then creates a “query” message for transmission to the SLSPlatform 138. When the SLS Platform 138 receives the “query” message,the SLS Platform 138 creates a reply message for transmission back tothe SSP 122 as it is configured to do. The SLS platform 138 isconfigured to provide the necessary information for routing thecommunication using the SLS. In this particular embodiment, transmissionof these messages is performed using the CAP portion of the SS7 protocolsuite. In other embodiments, and as described more fully above, theparticular protocol or communications standard may be ROSE, VOIP, or anyother similar standard known to those skilled in the art.

The reply message contains the information necessary for the SSP 122 toimplement the SLS. In typical embodiments, the reply message may containthe information/instructions necessary to properly route thecommunication to the terminating destination TD_(N) 116 at the directorynumber included in the dialed sequence. However, in other embodiments,the reply message may additionally contain the information/instructionsnecessary for further processing of the communication, such as verifyingthat the subscriber TD₁ 110 is authorized to use the advanced networkfunctions, like the SLS, and supplementing/supplanting data within thecommunication. For example, the reply message may additionally containinstructions for the SSP 122 indicating which of the subscriber's CLIDs(either its primary directory number or its SLS number, etc.) should bepopulated for display on the called party's TD_(N) 116.

FIG. 2 is a high level diagram illustrating of an exemplary globaltelecommunications network wherein a subscriber to a second line servicecan roam on a foreign telecommunications network. The exemplary globaltelecommunications network 200 includes a subscriber TD₁ 110 and a thirdparty TD_(N) 116; although, it is possible that others TDs like TD₂ 112and TD₃ 114 may be included as well. Notably, although the TD_(N) 116 isnot illustrated to suggest it, it is envisioned that in someembodiments, both the subscriber TD₁ 110 and the third party TD_(N) 116may be SLS enabled. For exemplary purposes the subscriber TD₁ 110 isdepicted as being SLS enabled and the third party TD_(N) 116 is depictedas not having a second line service associated with it. Othercombinations of primary line services and SLS for each of TD₁ 110 andTD_(N) 116 are envisioned.

Additionally, it is envisioned that TDs like TD₁ 110 and TD_(N) 116 arecapable of roaming from their home AIN, like the environment 100depicted in FIG. 1, to another telecommunications network by methods andsystems known to those of ordinary skill in the relevant art. In thisway, TDs like TD₁ 110 and TD_(N) 116 can travel outside of their homeAINs and continue utilizing their advanced network functions and callingplans. As such, for purposes of FIG. 2, AIN 202 represents the home AINfor TD₁ 110 and TD_(N) 116. AINS 202 is essentially the same system 100described by FIG. 1. On the other hand, telecommunications network 201represents any telecommunications network on to which TD₁ 110 can roam.

When an SLS subscriber wishes to initiate a communication from their TD₁110 to a third party TD_(N) 116 using their SLS number instead of theirprimary telephone number, and the subscriber is roaming ontelecommunications network 201, the subscriber dials the dialed sequenceincluding the trigger as described above. Because the TD₁ 110 isroaming, the telecommunications network 201 ultimately intercepts thecommunication at one of its switches or MTSOs. The telecommunicationsnetwork 201 does not inherently recognize the foreign TD₁ 110 roaming onits network, so it does not have the necessary information to determinehow to process TD₁ 110's communication and the embedded trigger.

As such, the telecommunications network 201 sends a “query” message tothe home AIN 202 of TD₁ 110 for purposes of getting instructions on howto process TD₁ 110's communication and the embedded trigger.Consequently, the telecommunications network 201 creates a “query”message for transmission to AIN 202 through the SS7 protocol suite,specifically the CAP portion of the protocol, as it is programmed to do.In other embodiments, the particular protocol or communications standardmay be ROSE, VOIP, or any other similar standard known to those skilledin the art. It is known by those skilled in the art that messageexchanges between a “roamed to network” and a home network can occurthrough various intermediary network elements.

Regardless of the string of intermediary network elements involved inbetween the telecommunications network 201 and AIN 202, eventually anSSP, like SSP 122 in FIG. 1, on AIN 202 receives the “query message.”Like FIG. 1, the SSP on AIN 202 searches for the trigger in thecommunication as it is programmed to do. Because the communication fromTD₁ 110 includes the predefined trigger for the SLS, the SSP on AIN 202functions as an intermediary as the communication is processed using SLSPlatform 138. Like FIG. 1, SLS Platform 138 creates a reply message fortransmission back to the SSP on AIN 202 that is ultimately relayed backto the telecommunications network 201. Transmission of these messages,including any messages between intermediary network elements, isperformed using the SS7 protocol suite, specifically the CAP portion ofthe protocol. In other embodiments, the particular protocol orcommunications standard may be ROSE, VOIP, or any other similar standardknown to those skilled in the art.

Like FIG. 1, the reply message contains the information necessary forthe telecommunications network 201 to implement the SLS. In someembodiments, the reply message may contain the information/instructionsnecessary to properly route the communication to the terminatingdestination TD_(N) 116 at the directory number included in the dialedsequence. However, in another embodiment, the reply message mayadditionally contain the information/instructions necessary for furtherprocessing of the communication, such as verifying that the subscriberTD₁ 110 is authorized to use the telecommunications network 201 whenroaming, verifying that the subscriber TD₁ 110 is authorized to use theadvanced network functions, such as SLS, on AIN 201, andsupplementing/supplanting data within the communication. For example,the reply message may additionally contain instructions for thetelecommunications network 201 indicating which of the subscriber'sCLIDs (either its primary directory number or its SLS number, etc.)should be populated for display on the called party's TD_(N) 116.

FIG. 3 is a flow diagram illustrating actions included in an exemplaryembodiment of the SLS. FIG. 3 shows an embodiment from two perspectives,the view of the calling party 300 and the view of the switch 400. In theillustrated embodiment, the flow is initiated by a calling party 300dialing a special sequence or command and a directory number 304. Forinstance, the calling party 300 may dial *32 (or any other prefix)followed by a 10 digit telephone number, or the calling party 300 maydial a 10 digit telephone number followed by a suffix (i.e. *32, #45,etc.). The process of dialing is not limited to pressing buttons on atelephone device but rather, may include recalling a number from memoryand selecting that number, or having a computer or processing unit dialor send the desired dialed sequence. In addition, in some embodimentsvoice commands can be utilized to control or invoke and SLS call,specialized hard or soft buttons can be included on the TD, etc.

Further, rather than a prefix of suffix, in some embodiments a specialarea code or telephone number may be used to identify the intention touse and SLS number. For instance, the dialed number may be 999-xxx-xxxx,where 999 signals the use of a second line number and the 7 digit numbercan be looked up in the subscriber's database to identify theappropriate area code. Moreover, one of ordinary skill in the art willrecognize that telephone numbers, although generally described in thisdisclosure as possibly including a specific country code, area code, andseven digit directory number, may include any country code, area codeand directory number system known to those skilled in the art.

The communication containing or associated with the dialed sequence thenpropagates to the switch 400, such as SSP 122 from FIG. 1, where thecommunication is received 404. The received communication is thenanalyzed, processed, parsed and/or otherwise interpreted for call setupand routing 408 and to determine the presence of a trigger (such as theprefix, suffix or other indication) to initiate an SLS based call. Ifthe switch 400 does not detect that the received communication includesthe special sequence (or trigger) 412, then normal processing isperformed for the communication 416. However, if the switch 400 doesdetect that the received communication includes the special sequence412, then the switch 400 is programmed to determine if the communicationis enabled for SLS 420, as described above and depicted in FIG. 1 andFIG. 2.

If the switch 400 determines that the communication is not enabled forSLS 420, then exception processing can be performed 424, which may belimited to or include simply performing normal processing 416. However,if the switch 400 determines that the communication is enabled for SLS,then the switch 400 performs SLS processing for the communication 426and thus completes the call from the calling party to a TD associatedwith the dialed directory number. From the calling party's perspective,the communication is directly connected to the called party 308.

FIG. 4 is a flow chart illustrating actions included in an exemplaryembodiment of the SLS, focusing on the operation of an embodiment fromthe calling party's and the called party's perspective. In FIG. 4, thecalling party 300 dials the dialed sequence 304 as illustrated in FIG. 3and the switch 400 processes the call 402. In some embodiments, once thecalling party is connected to the called party 500, the called party'sTD CLID field can be populated with the calling party's SLS number orother mechanisms may be used to alert or inform the called party withregards to the SLS of the calling party 300.

In the reverse direction, if a third party calls a subscriber by usingthe subscriber's SLS number, then the switch 400 receives the call anddetermines that the number is to be serviced by the SLS platform (i.e.,the SLS number is in a block of numbers or a list of numbers that are tobe routed to an SLS platform for processing). The SLS platform can thenhave the switch initiate a call or complete the call to the subscriber'snormal number (the number assigned to the subscriber's terminal device).In doing so, the SLS can cause the switch to include a special sequencewith the digits sent to the subscriber's equipment to indicate that thisis a call to the SLS number of the subscriber. The sequence can be inthe form of a prefix, suffix, other embedded number or using a specialarea code or other similar techniques.

Certain actions or blocks in the processes or process flows described inthis specification naturally precede others for the embodiment tofunction as described. However, the various embodiments are not limitedto the order of the actions or blocks as presented or described. Thatis, it is recognized that some actions or blocks may be performedbefore, after, or in parallel (substantially simultaneously with) otheractions or blocks without departing from the scope and spirit of thevarious embodiments. In some embodiments, certain actions or blocks maybe omitted or not performed as not all embodiments necessarily mustimplement all of the described actions. Also, in some embodiments,multiple actions depicted and described as unique actions or blocks inthe present disclosure may be comprised within a single step or block.Further, words such as “thereafter”, “then”, “next”, “subsequently”,etc. are not intended to limit the order of the actions or blocks. Thesewords are simply used to guide the reader through the description of theexemplary method.

Additionally, one of ordinary skill in programming will be able to writecomputer code or identify appropriate hardware and/or circuits toimplement the various embodiments, as well as features and aspectsthereof, based on the flow charts and associated description in thisspecification. Therefore, disclosure of a particular set of program codeinstructions or detailed hardware devices is not considered necessaryfor an adequate understanding of how to make and use the variousembodiments. The functionality of the claimed computer implementedprocesses is explained in more detail in the above description and inconjunction with the Figures that may illustrate various process flows.

In one or more exemplary aspects, the functions described may beimplemented in hardware, software, firmware, or any combination thereof.If implemented in software, the functions may be stored on ortransmitted as one or more instructions or code on a computer-readablemedium. Computer-readable media include both computer storage media andcommunication media including any medium that facilitates transfer of acomputer program from one place to another.

In the description and claims of the present application, each of theverbs, “comprise”, “include” and “have”, and conjugates thereof, areused to indicate that the object or objects of the verb are notnecessarily a complete listing of members, components, elements, orparts of the subject or subjects of the verb.

A storage media may be any available media that may be accessed by acomputer. By way of example, and not limitation, such computer-readablemedia may comprise RAM, ROM, EEPROM, CD-ROM or other optical diskstorage, magnetic disk storage or other magnetic storage devices, or anyother medium that may be used to carry or store desired program code inthe form of instructions or data structures and that may be accessed bya computer.

Also, any connection is properly termed a computer-readable medium. Forexample, if the software is transmitted from a website, server, or otherremote source using a coaxial cable, fiber optic cable, twisted pair,digital subscriber line (“DSL”), or wireless technologies such asinfrared, radio, and microwave, then the coaxial cable, fiber opticcable, twisted pair, DSL, or wireless technologies such as infrared,radio, acoustic and microwave are included in the definition of medium.

Disk and disc, as used herein, includes compact disc (“CD”), laser disc,optical disc, digital versatile disc (“DVD”), floppy disk and blu-raydisc where disks usually reproduce data magnetically, while discsreproduce data optically with lasers. Combinations of the above shouldalso be included within the scope of computer-readable media.

Therefore, although selected aspects have been illustrated and describedin detail, it will be understood that various substitutions andalterations may be made therein without departing from the spirit andscope of the present invention, as defined by the following claims.

What is claimed is:
 1. A method for routing communications between afirst station and a second station through a voice channel basedcommunication network, wherein the first station includes a cellularservice provider number and a second line service (SLS) number providedto a subscriber for use with the first station, and the second stationincludes a cellular service provider number, the method comprising theactions of: receiving a communication at a network switch, thecommunication being sent by an SLS subscriber from the first station andcomprising a network recognizable dialed number; examining the dialednumber in the communication at the network switch; determining that thecommunication is to be processed by an SLS platform based on the dialednumber; transmitting from the network switch, based on the dialednumber, a query message directly to the SLS platform that iscommunicatively coupled to the network switch; receiving at the networkswitch a reply to the query message directly from the SLS platform, thereply including an SLS number to be identified as an originating numberfor the communication and a service provider number associated with thesecond station as a destination for the communication; and routing thecommunication through the network switch, based at least in part on thereply to the query message, wherein routing the communication comprisesconnecting through the network switch and a network switch of the secondstation, a voice channel circuit to the service provider numberassociated with the second station and populating a CallerIdentification (CLID) with the SLS number.
 2. The method of claim 1,wherein the action of transmitting the query message directly to the SLSplatform comprises the actions of: the network switch executing aprogrammed command resulting in sending a message directly to the SLSplatform; and the network switch pausing further processing of thecommunication until the network switch receives the reply to the querymessage from the SLS platform.
 3. The method of claim 2, wherein theaction of executing the programmed command comprises: the network switchcreating a second query message based at least in part on the programmedcommand; and the network switch requesting the SLS platform through thesecond query message to provide information to interpret the dialednumber included with the communication for routing the communication toa correct terminating destination.
 4. The method of claim 2, wherein thecommunication network is the Public Switched Telephone Network and thenetwork switch is an SSP switch, and the step of routing the action ofsending a query message directly to the SLS platform further comprisesby passing any interaction with a Service Control Point (SCP).
 5. Themethod of claim 2, wherein the first station is roaming on a secondtelecommunications network, wherein a first telecommunications networkis a home network of the first station, and the first telecommunicationsnetwork and the second telecommunications network can be communicativelycoupled and distinct networks, wherein the action of receiving acommunication at a network switch further comprises receiving thecommunication at a first network switch residing with the firsttelecommunications network, the communication being sent from the firststation while roaming on the second telecommunications network; whereinthe action of transmitting from the network switch, based on the dialednumber, further comprising transmitting from the firsttelecommunications network switch a query message directly to the SLSplatform that is communicatively coupled to the first telecommunicationsnetwork switch; wherein the action of routing the communication throughthe network switch, further comprises routing the communication througha second network switch based at least in part on the reply to the querymessage, wherein routing the communication comprises connecting throughthe second network switch and the network switch of a second station, avoice channel circuit to the service provider number associated with thesecond station and populating a Caller Identification (CLID) with theSLS number.
 6. A method for completing a communication setup initiatedfrom an originating station and directed to a terminating destination,the method comprising: receiving a communication at a switch, thecommunication being sent from the originating station through an MTSO tothe switch, and the communication comprising a dialed number;recognizing by the switch that the dialed number is a valid networktelephone number; recognizing by the switch that the dialed number is arequest for an SLS call; based at least in part on the dialed number,executing by the switch a programmed command to send a query message toan SLS platform that is communicatively coupled to the switch; holdingby the switch the communication until the switch receives the reply tothe query message from the SLS platform; and receiving at the switch areply to the query message from the SLS platform, wherein the reply tothe query message comprises: information for how to interpret the dialednumber included with the communication for routing the communication toa correct terminating destination; and information indicating a CLIDfield to include with the communication, the CLID field comprising anSLS number of the originating station; and establishing a communicationchannel setup through the switch, based at least in part on the reply tothe query message, wherein establishing the communication comprisesconnecting through the switch a voice channel circuit between theoriginating station and the terminating destination and routing thecommunication by populating by the switch the CLID field of data beingtransferred to the terminating destination with the SLS number of theoriginating station.
 7. A method for routing a communication from anoriginating station, roaming on a second telecommunications network, toa terminating destination, wherein a first telecommunications network isthe home network of the originating station, and the firsttelecommunications network and the second telecommunications network canbe communicatively coupled and distinct networks, the method comprising:receiving a communication at a switch residing within the firsttelecommunications network, the communication being sent from theoriginating station that is roaming on the second telecommunicationsnetwork, the communication comprising a trigger and a directory number;recognizing by the switch that the directory number is a 10 digittelephone number; recognizing by the switch that the trigger isconfigured to invoke an SLS call; transmitting from the switch, based atleast in part on the trigger, a query message to an SLS platformresiding within the first telecommunications network by: executing bythe switch a programmed command to send the query message to the SLSplatform; and holding by the switch the communication until the switchreceives the reply to the query message from the SLS platform; receivingat the switch a reply to the query message from the SLS platform; andcommunicating to the second telecommunications network through theswitch routing information for the communication including transmittingby the switch to the second telecommunications network an SLS number ofthe originating station for a CLID field of the terminating destination,based at least in part on the reply to the query message, wherein thereply to the query message comprises: routing information for thedirectory number included with the communication for routing thecommunication to a correct terminating destination; and informationindicating the CLID field to include with the communication, the CLIDfield comprising the SLS number of the originating station.